var student:{name:string,sex:string,grade:number,cm:number,stud():void,gram():void}={
  name:"张三",
  sex:'男',
  grade:99,
  cm:1.67,
  stud() {
    console.log("1111");
    
  },
  gram() {
    console.log("hhhhh");
    
  },
}
student.gram()